I got to watch my sister defend her PhD dissertation at George Washington University yesterday and it was one of the most thrilling things I've ever seen. I get the feeling she might make me start addressing her as 'doctor,' which I will gladly do!

D.C. Mayor Vincent C. Gray. (Marvin Joseph/WASHINGTON POST)

Yesterday's Million Hoodie March has led to a larger discussion about guns, in general . While the death of Trayvon Martin is tragic on multiple levels, it has opened up the debate over the overall gun policies in this country. Firearm sales are up nationwide, even though violent crimes are down. The Root's Steven Gray explains why President Obama needs to lead this discussion and how this case "is a consequence of our thirst for guns." Also, Courtland Milloy's thoughts on the matter.

Metro could use a fun story these days . More important, it could use some more money. And now that the precedent has been set in Madrid, it might be time for WMATA to open things up creatively and start selling naming rights to its stations. The system did release a new map this week, with a few tweaks. So, The Post's Michael Katz took some suggestions on what he thought would be good commercial tie-ins for some names. Some of these are quite funny.

The first time I ever heard of Big Time Rush was on Thanksgiving  when they performed at an NFL game. And flipping through the channels the other day, I saw something I thought was an Old Navy/Gap/PacSun/Levi's/who knows what commercial, but was an actual music video. That was my introduction to One Direction. Melinda Newman explains the comeback of boy bands, which is much to the radio business's delight.

Stop me if you've heard this before : JaVale McGee made a heads up play that won his team a basketball game last night. Keep going? Okay. A Wizards big man notched an impressive double-double leading the team to a semi-decisive road win Wednesday. Still nothing? I know, it's unbelievable. McGee had a great putback for the Nuggets and Nene might as well have been Wes Unseld out there in New Jersey. I guess both teams can say it was a good trade.

Extra Bites

• As scary as the New York City subway system can be, I can't imagine what I'd do if I saw a monster snake in Grand Central Station. Metro needs more gags like this. The riders could use a good practical joke.

• A new study shows that many people would give up alcohol, chocolate and for some, sex, before they'd go without Internet access. Understandable.

• Ever wanted to take pictures underwater with your iPhone? Now you can.

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Read more on The Root DC

The Game: Season 5, Ep. 10

A community mourns Trayvon Martin’s death

Signing with Obama

On the hunt for a black salon

The quest for the perfect engagement ring